TITLE: GCN CIRCULAR NUMBER: 12750 SUBJECT: GRB 111228A: NOT optical observation DATE: 11/12/29 03:04:32 GMT FROM: Dong Xu at Weizmann Inst D. Xu (WIS/NAOC), J. McCormac (Queen's Univ. Belfast), and P. Jakobsson (Univ. Iceland) report on behalf of a larger collaboration: We observed the field of GRB 111228A (Ukwatta et al., GCN 12737) with the 2.5m Nordic Optical Telescope (NOT) equipped with the AFOSC optical camera. A 600s R-band image was taken with mean time 01:32 UT on 2011-12-29 (9.8 hr after the burst trigger). We clearly detected the afterglow (Ukwatta et al., GCN 12737; Xin et al., GCN 12738; Klotz et al., GCN 12742) at a magnitude R = 19.01 +/- 0.05, calibrated with the USNO-B1 1083-0199833 star (R2 = 17.28 mag; also used by Klotz et al., GCN 12746 and Nascimbeni et al., GCN 12748). Further observations are ongoing.